HAL Id: in2p3-00005190
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Submitted on 24 Sep 1999
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AGAPE : a microlensing search for dark matter by
monitoring pixels
P. Gondolo, R. Ansari, M. Aurire, P. Baillon, A. Bouquet, G. Coupinot, C. Coutures, C. Ghesquiere, Y. Giraud-Heraud, J. Hecquet, et al.
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AGAPE: a Microlensing Search for Dark Matter by Monitoring Pixels
P. Gondolo Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK (For the AGAPE Collaboration)
talk presentedattheInternational Conference on
Dark andVisibleMatter inGalaxies, SestoPusteria, Italy,2{5 July1996
Gondolo, et al.AGAPE: a Microlensing Search... page1
AGAPE: a Microlensing Search for Dark Matter by Monitoring Pixels
P. Gondolo Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK For the AGAPE Collaboration: R. Ansari,1 M. Auriere,2 P. Baillon,3 A. Bouquet,4 G. Coupinot,2 Ch. Coutures,5 C. Ghesquiere,4 Y. Giraud-Heraud,4 J. Hecquet,6 J. Kaplan,4 Y. Le Du,4 A.L. Melchior,4 M. Moniez,1 J.P. Picat,6 G. Soucail6
1Laboratoire de l'Accelerateur Lineaire, Universite Paris-Sud, 91405 Orsay, France 2Observatoire Midi-Pyrenees, unite associee au CNRS (UMR 5572), 62500 Bagneres de Bigorre, France 3CERN, 1211 Geneve 23, Switzerland 4Laboratoire de Physique Corpusculaire, College de France, Laboratoire associe au CNRS-IN2P3 (URA 6441), 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France 5SPP/DAPNIA, CEN Saclay, 91191 Gif-sur-Yvette, France 6Observatoire Midi-Pyrenees, unite associee au CNRS (UMR 5572), 14 avenue Belin, 31400 Toulouse, France
abstract AGAPE is an observational search of massive compact halo objects (MACHOs) in the direction of M31 by means of a novel method: the gravitational microlensing of unresolved stars. The search consists in examining CCD pixel light curves for microlensing features. The high level of temporal stability necessary to detect microlensing events has been achieved, with quiet pixels stable within a factor of two of the photon noise (the brightest ones down to a level of 0.001 mag). The data analysis is still in progress, but hundreds of variable objects (cepheids, novae, ...) have already been found. Among them there are several lightcurves that resemble microlensing events.
